If you ever had the doubt, why my WiFi speed is slow even while i stand next to the Access point or with having good coverage. Just having a strong wireless coverage/ signal alone will not help you to achieve the highest possible speed on wireless. We need to consider the floor noise too. The following chart has MCS values for SNR(signal to noise ratio)
This can come handy when calculating the throughput on wireless Networks:
I was always wondering, if there is some reference value i could use when i troubleshoot a wireless and RF issues. Particularly when it comes to duty cycle /channel utilization, time delay and retries. Here are some values and you can keep this as reference for your Wlan troubleshooting:
#802.11 statistics values for reference:
Retries: less than 20%
Loss: not exceed 1% packet loss
Channel utilization: keep it under 50-40% and possible 30%
Noise: should not exceed -92dBm, Where -80dBm is bad.
SNR:should be greater than 25dB
Signal strength : should be around -67 or -65 even in the edge of the cell.
Time or delay: Keep it below 100 and possible <300 ms
Since this is already back to school time, the WiFi network Engineers would already see lot new devices in the school WiFi network and also students might have got some more devices added to already high density environment.
Forinet has some recommendations to help you with some stable Wifi network.
–WiFi signal gets attenuated during the signal propagation depending upon the object or construction material
–Here are some object you could find in common office space and its attenuation values.
Examples of the attenuation values of common office construction:
As a result, a typical small office could have several plasterboard walls equating to an additional 9 to 12dB of attenuation. Metal doors and glass walls could sometimes be in the way of the propagation of the signal, causing even larger amounts of attenuation. Of course this decreases the operating range of the access points
–Aruba has the following recommendation during the 2015 Atmosphere
–The Following values with a smart WiFi design is Essential in a high density deployment.